| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.487 | 0.792 | 0.232 | 4.426 |
| Arsenic | As (ppm) | 4.049 | 2.174 | 0.948 | 15.964 |
| Calcium | Ca (wt%) | 0.079 | 0.040 | 0.016 | 0.268 |
| Copper | Cu (ppm) | 21.677 | 35.618 | 1.550 | 365.092 |
| Iron | Fe (wt%) | 1.040 | 0.479 | 0.193 | 3.493 |
| Mercury | Hg (ppm) | 0.016 | 0.007 | 0.009 | 0.060 |
| Magnesium | Mg (wt%) | 0.079 | 0.047 | 0.012 | 0.297 |
| Manganese | Mn (ppm) | 709.000 | 535.759 | 113.388 | 5980.060 |
| Sodium | Na (wt%) | 0.151 | 0.092 | 0.016 | 0.543 |
| Phosphorus | P (wt%) | 0.020 | 0.010 | 0.007 | 0.084 |
| Lead | Pb (ppm) | 14.687 | 3.671 | 5.454 | 41.242 |
| Selenium | Se (ppm) | 0.168 | 0.058 | 0.101 | 0.499 |
| Titanium | Ti (wt%) | 0.328 | 0.067 | 0.120 | 0.515 |
| Zinc | Zn (ppm) | 22.175 | 8.642 | 4.985 | 56.696 |